[Mac] User manager should show up as a standalone window.

chrome/chrome_browser_ui.gypi

 # Copyright 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'targets': [
     {
       'target_name': 'browser_ui',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 1024 matching lines @@
         'browser/ui/cocoa/toolbar/toolbar_controller.h',
         'browser/ui/cocoa/toolbar/toolbar_controller.mm',
         'browser/ui/cocoa/toolbar/toolbar_view.h',
         'browser/ui/cocoa/toolbar/toolbar_view.mm',
         'browser/ui/cocoa/toolbar/wrench_toolbar_button_cell.h',
         'browser/ui/cocoa/toolbar/wrench_toolbar_button_cell.mm',
         'browser/ui/cocoa/ui_localizer.h',
         'browser/ui/cocoa/ui_localizer.mm',
         'browser/ui/cocoa/url_drop_target.h',
         'browser/ui/cocoa/url_drop_target.mm',
+        'browser/ui/cocoa/user_manager_mac.h',
         'browser/ui/cocoa/user_manager_mac.mm',
         'browser/ui/cocoa/validation_message_bubble_cocoa.mm',
         'browser/ui/cocoa/validation_message_bubble_controller.h',
         'browser/ui/cocoa/vertical_gradient_view.h',
         'browser/ui/cocoa/vertical_gradient_view.mm',
         'browser/ui/cocoa/view_id_util.h',
         'browser/ui/cocoa/view_id_util.mm',
         'browser/ui/cocoa/view_resizer.h',
         'browser/ui/cocoa/web_contents_modal_dialog_manager_cocoa.mm',
         'browser/ui/cocoa/web_dialog_window_controller.h',
@@ skipping 2295 matching lines @@
             'browser/ui/webui/local_discovery/local_discovery_ui.cc',
             'browser/ui/webui/local_discovery/local_discovery_ui.h',
             'browser/ui/webui/local_discovery/local_discovery_ui_handler.cc',
             'browser/ui/webui/local_discovery/local_discovery_ui_handler.h',
           ],
         }],
       ],
     },
   ],
 }